Search found 34021 matches

by dogman dan
Jan 18 2019 8:07am
Forum: E-Bike Technical
Topic: Wiring harness ideas
Replies: 8
Views: 308

Re: Wiring harness ideas

I kept using connectors, including the cheap ass white scooter plugs. But I live in a crazy dry climate, and kept moving shit from one bike to another constantly. But what you want, max reliability on the same bike for 5+ years, solder it all, except for perhaps the plug from battery to controller. ...
by dogman dan
Jan 18 2019 8:00am
Forum: E-Bike Technical
Topic: Geared Bafang hub slipping internally
Replies: 9
Views: 155

Re: Geared Bafang hub slipping internally

Sounds to me like maybe the key on the axle sheared. you should have easily seen that when it was apart though, if that is it.
by dogman dan
Jan 18 2019 7:59am
Forum: E-Bike Technical
Topic: Power switched off for less than a milli second
Replies: 2
Views: 89

Re: Power switched off for less than a milli second

Could be just a loose wire. But sometimes an e bike will shut off briefly because the battery sags below the controller LVC under load. Batteries hate cold, so that could be the real problem. Soon as the load is off it, the voltage comes back up, and the controller starts to work again, only to sag ...
by dogman dan
Jan 18 2019 7:54am
Forum: E-Bike General Discussion
Topic: Is pedaless ebikes illegal in NYC?
Replies: 6
Views: 228

Re: Is pedaless ebikes illegal in NYC?

Did they ever legalize e bikes in New York state at all? I may have not heard, but for decades, ALL e bikes were illegal in NY. Not that that stopped many thousands from riding them in NYC, but what I'm getting at is pedals make it possible you look legal. No pedals obviously not, unless you can pla...
by dogman dan
Jan 18 2019 7:46am
Forum: E-Bike General Discussion
Topic: 29" e-bike for commuting - rear hub motor or TSDZ2 ?
Replies: 10
Views: 345

Re: 29" e-bike for commuting - rear hub motor or TSDZ2 ?

Mid drive for the best off road bike, that's able to climb steep hills. With a large 29" wheel, a hub motor may work ok if its 1000w, but not as good as a 350w mid drive would, on the steeper stuff. However, Can the trail be rode at 15 mph the whole way? Seems like the downhill leg should be much qu...
by dogman dan
Jan 18 2019 7:39am
Forum: E-Bike General Discussion
Topic: I bought an E Bike for my wife but she says its to slow
Replies: 15
Views: 506

Re: I bought an E Bike for my wife but she says its to slow

Since 20 mph takes 400-600w depending on conditions, I suspect your setup is only going to hit 30 kph in ideal conditions, no hill, no wind, or even needing some slight downgrade. Most likely you can hit 500w briefly with that kit, but as motor rpm goes up, its max wattage goes down. So I bet at ful...
by dogman dan
Jan 18 2019 7:34am
Forum: E-Bike General Discussion
Topic: Crystalyte/LiFePO4 preasembled ebike available anywhere?
Replies: 13
Views: 217

Re: Crystalyte/LiFePO4 preasembled ebike available anywhere?

Sucks your bike burned your house. I got lucky and only got the garage actually burned when my bike set the garage on fire, charging the battery. I hope you had insurance as good as mine was. Most of what burned in the fire was bought at half to a third of retail price, but insurance paid off on it ...
by dogman dan
Jan 15 2019 9:03am
Forum: E-Bike Technical
Topic: Crystalyte rear 408 identification and help
Replies: 5
Views: 165

Re: Crystalyte rear 408 identification and help

Thanks for the reply, I figured you took out all the screws, but others have misunderstood how the puller works.

so that comment was aimed more at others reading. It was just that rusted up.
by dogman dan
Jan 15 2019 8:59am
Forum: E-Bike Technical
Topic: Unusual Motor Behavior-Who has seem this???
Replies: 24
Views: 416

Re: Unusual Motor Behavior-Who has seem this???

If it really stutters, then the problem is a bad connection. It could be a cold solder joint inside the controller itself, on the motor or halls wires. Failing controller possible, but in my experience the symptoms are not stutter when that happens. The single most common problem though, is with the...
by dogman dan
Jan 15 2019 8:51am
Forum: E-Bike General Discussion
Topic: 40-50 mph 75 mile range
Replies: 50
Views: 1309

Re: 40-50 mph 75 mile range

FWIW, to go 80 miles range slow, on a big cargo bike meant carrying 2000 wh of battery. That battery alone would buy a small motorcycle, used Japanese, or new china type. None of which he can ride now though. So a slower, lower range e bike is his current option. Affordably, he can do a bike with 20...
by dogman dan
Jan 15 2019 8:44am
Forum: E-Bike General Discussion
Topic: Controllers, Torque and heat
Replies: 9
Views: 311

Re: Controllers, Torque and heat

Well, if a motor is rated for 5000w, it is going to be capable of serious hauling ass up hills, overloaded. I betcha though, hes running a 500w DD hubmotor, which has about a 2000w practical limit. I used to run that type motor all winter on 3000w, 72v 40 amps, and had great torque, because of both ...
by dogman dan
Jan 15 2019 8:37am
Forum: Battery Technology
Topic: Losing Lipo cells
Replies: 6
Views: 207

Re: Losing Lipo cells

Old cells is your main problem. My use of old cells gets limited to .5c, or capacity suffers real bad. Usually this is a slightly puffed cell, but not really puffed. They just lose any ability to handle 1c or more, after about 3 years, regardless if they were used much or not. Yeah, you tested them ...
by dogman dan
Jan 15 2019 8:30am
Forum: General Discussion
Topic: Help me ID this controller and what voltage I can use it with
Replies: 7
Views: 415

Re: Help me ID this controller and what voltage I can use it with

Clearly the thing does not have a 48v cutoff, which would be around 42v usually. In order to develop the full 1500w though, it would need to run on 60v. Sounds like it has no LVC to me, or at least a very low one. Most likely your cut off problem is the battery, its a 45 amps max controller, so that...
by dogman dan
Jan 14 2019 8:11am
Forum: General Discussion
Topic: Fewer Americans bike to work despite new trails, lanes and bicycle share programs
Replies: 14
Views: 342

Re: Fewer Americans bike to work despite new trails, lanes and bicycle share programs

Well, a lot of us are retiring right now. I don't commute anymore, ever. :D Same numbers might be seen in bike sales, as older bike riders simply die off, or just don't need a tenth bike at age 70. And, two buck gas does make driving appealing. Road riding is frightening. When I switched from e bike...
by dogman dan
Jan 14 2019 7:50am
Forum: E-Bike General Discussion
Topic: Controllers, Torque and heat
Replies: 9
Views: 311

Re: Controllers, Torque and heat

Let us know what your total weight is, and the grade of the hill, and its length. With that info, we can start to make practical suggestions based on our real world experience. If the speed will be limited by the power, then what you need is a mid drive you can gear down, or a very small wheel on a ...
by dogman dan
Jan 14 2019 7:33am
Forum: E-Bike General Discussion
Topic: Coaster Cycles Transit trike?
Replies: 7
Views: 202

Re: Coaster Cycles Transit trike?

FWIW, E-bikekit has a front hub kit for that type of typical delta trike. It has a powerful but low rpm direct drive motor, so its top speed matches delta trikes safe maximum. But its costly, like all the EBK kits. Don't put a 30 mph 48v 1000w kit on a delta trike. A mid drive would be a great choic...
by dogman dan
Jan 14 2019 7:26am
Forum: E-Bike General Discussion
Topic: 40-50 mph 75 mile range
Replies: 50
Views: 1309

Re: 40-50 mph 75 mile range

If you are still watching this thread EV tom, your situation is not unusual. lose the job, hard to keep up the insurance, but you gotta drive the thing till they take it away right? Now you are in a situation similar to where I was when I was 19. In high school I had time to work, buy a truck, insur...
by dogman dan
Jan 10 2019 8:54am
Forum: E-Bike Build Threads / Photos & Video
Topic: Dogmans Longtail Beach Cruiser
Replies: 47
Views: 11821

Re: Dogmans Longtail Beach Cruiser

Well, its 2019 now, so long overdue to update this thread. The bike has served very well, never having any problems with the welds. Tows a trailer like a champ. I never did tour on it, so I went ahead later the first summer, and put a much more powerful and fast motor on it. An old heavy crystalyte ...
by dogman dan
Jan 10 2019 8:18am
Forum: E-Bike General Discussion
Topic: 40-50 mph 75 mile range
Replies: 50
Views: 1309

Re: 40-50 mph 75 mile range

Well, you WILL get attention from the cops, if you build for more than 30 mph. Sounds like you lost your license, and plan to keep stacking more years of don't have one onto it to me. Something like this can carry 2000 wh of battery, 48v 40 ah, go 30 mph, and not get too much attention from cops. Fa...
by dogman dan
Jan 10 2019 8:15am
Forum: E-Bike Technical
Topic: Battery failing! Danger?
Replies: 2
Views: 335

Re: Battery failing! Danger?

Well, it would not go in my garage, brand new. Not after the garage fire I had. So that's my advice for the garage. The battery itself sounds bad. Not sure what you mean by the notoriously hot wire, but a warm wire from battery to controller is fairly normal, but it could get hot just from a really ...
by dogman dan
Jan 10 2019 8:05am
Forum: E-Bike Technical
Topic: Unusual Motor Behavior-Who has seem this???
Replies: 24
Views: 416

Re: Unusual Motor Behavior-Who has seem this???

Bad connection, and despite your inspection, I believe it is on the motor wires. Because it stutters. If it just stopped powering and started back up, then the problem could easily be on throttle, or display. Or still the motor wires. Or the battery, combined with that kit. But its stuttering, so it...
by dogman dan
Jan 10 2019 7:59am
Forum: E-Bike Technical
Topic: Crystalyte rear 408 identification and help
Replies: 5
Views: 165

Re: Crystalyte rear 408 identification and help

Was fixable, but that broken flange is not very fixable. I suppose you could weld it, but not near worth the effort even if you are an expert aluminum welder. I'm curious how the flange broke, did you have the bolts out on both sides? If not, you should have had the puller on the side of the motor t...
by dogman dan
Jan 09 2019 9:17am
Forum: E-Bike Technical
Topic: Torque arm design help
Replies: 11
Views: 285

Re: Torque arm design help

Make an L shaped torque arm, that will bolt to both those disk mount holes. then bolt up the brake with longer bolts, and if needed, washers to bring the TA and the disk mount to the same plane. The other side, looks to me like the derailleur hanger is a pretty effective TA, when used with a fabrica...
by dogman dan
Jan 09 2019 9:09am
Forum: E-Bike General Discussion
Topic: changing gear ratios
Replies: 16
Views: 304

Re: changing gear ratios

In general, a road crank will rub on an MTB frame. Because they are designed to go with a skinny frame. Really old frames might have better clearance, but the more recent stuff tends to be built to clear a 48 tooth front ring at best. If your frame is tight, you can see it now. if it looks like a bi...
by dogman dan
Jan 09 2019 8:46am
Forum: E-Bike General Discussion
Topic: Torque Arm Derailleur Mount
Replies: 13
Views: 277

Re: Torque Arm Derailleur Mount

Your frame looks ideal for drilling a hole to bolt on half of the standard front torque arm. like this. or make your own plate. one on each side. If a regular bolt can't hold it, neither can the metal of your frame. But nothing wrong with the idea of a grade 8 bolt, simply because it won't get its t...